DE2644212C2 - Automatic brake clearance adjustment device for vehicle brakes - Google Patents
Automatic brake clearance adjustment device for vehicle brakesInfo
- Publication number
- DE2644212C2 DE2644212C2 DE2644212A DE2644212A DE2644212C2 DE 2644212 C2 DE2644212 C2 DE 2644212C2 DE 2644212 A DE2644212 A DE 2644212A DE 2644212 A DE2644212 A DE 2644212A DE 2644212 C2 DE2644212 C2 DE 2644212C2
- Authority
- DE
- Germany
- Prior art keywords
- brake
- assembly
- screw part
- ring
- hollow piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000000295 complement effect Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000002265 prevention Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
- F16D65/22—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for pressing members apart, e.g. for drum brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/38—Slack adjusters
- F16D65/40—Slack adjusters mechanical
- F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
- F16D65/56—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut
- F16D65/561—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut for mounting within the confines of a drum brake
- F16D65/562—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut for mounting within the confines of a drum brake arranged between service brake actuator and braking member, and subjected to service brake force
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/58—Mechanical mechanisms transmitting linear movement
- F16D2125/66—Wedges
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Description
Bremslüftspiel entsprechendes Spiel als Zahnflankenspiel zu bilden. Die Zähne 27 und 28 sind als Schrägzähne oder als ineinandergreifende, selbsthemmungsfreie Gewindegänge ausgebildetTo form brake clearance corresponding game as a tooth flank play. The teeth 27 and 28 are helical teeth or designed as interlocking, self-locking-free threads
Eine weiche Druckfeder 30, die sich mit einem Ende an einem Abstützglied 31 am Gewindeschaft 9 abstützt, spannt den Mitnehmerring 24 in eine Betriebsstellung vor, in der er arn konusförn-igen Abschnitt 25 der Bohrung 3 anliegt und dadurch gegen Drehung gesichert ist Eine ebenfalls am Abstützglied 31 anliegende, vergleichsweise harte Überlastungsfeder 32 spannt normalerweise den angetriebenen Ring 29 in Richtung des Dnickklotzes 20 vor, wobei die komplementären Kupplungsflächen 33 und 34 in gegenseitigen Eingriff drängen. Die Kupplungsflächen 33 und 34 sind am angetriebenen Ring 29 bzw. am Kopf 11 ausgebildetA soft compression spring 30, one end of which is supported on a support member 31 on the threaded shaft 9, Tension the driver ring 24 into an operating position in which it arn a conical section 25 of the bore 3 rests and is thereby secured against rotation. A comparatively also rests on the support member 31 hard overload spring 32 normally tensions the driven ring 29 in the direction of the Throwing block 20 in front, the complementary coupling surfaces 33 and 34 urge into mutual engagement. The coupling surfaces 33 and 34 are driven Ring 29 or formed on the head 11
Wenn die Betätigungsvorrichtung in eine Innenbakken-Trommelbremse zwischen einander benachbarte Bremsbackenenden eingebaut und die Bremsbackenstege in den Schlitzen 6 aufgenommen sind, wird zum Betatigen der Bremse der Spreizkeil 12 nach innen gedrängt, um das Druckstück 4 und die Baugruppe 5 voneinander weg zu schieben. Das Druckstück 4 und die Baiigruppe 5 drücken ihrerseits die Bremsbackenenden auseinander. Bei der Baugruppe 5 wird die vom Spreizkeil 12 ausgeübte Axialkraft vom Druckklotz 20 über das Schraubteil 10 und die selbsthemmenden Gewindegänge zwischen dem Gewindeschaft 9 und dem Hohlkolben 8 auf letzteren übertragen. Wird das Schraubteil 10 axial in der Bremsbetätigungsrichtung verstellt so wird der angetriebene Ring 29 mitgenommen, da die Kupplungsflächen 33 und 34 aneinander anliegen.When the actuator is in an inner jaw drum brake Installed between adjacent brake shoe ends and the brake shoe webs are received in the slots 6 is actuated the brake of the expanding wedge 12 is pushed inwards to the pressure piece 4 and the assembly 5 from each other push away. The pressure piece 4 and the bearing group 5 in turn push the brake shoe ends apart. In the case of the assembly 5, that exerted by the expanding wedge 12 is applied Axial force from the pressure block 20 via the screw part 10 and the self-locking threads between the threaded shaft 9 and the hollow piston 8 transferred to the latter. If the screw part 10 is axially in the Brake actuation direction is adjusted so the driven one Ring 29 taken along because the coupling surfaces 33 and 34 bear against one another.
Normalerweise reicht das Flankenspiel zwischen den Zähnen 27 und 28 aus, um die Bremsbetätigungsbewegung aufzunehmen, so daß der Mitnehmerring 24 in seiner Betriebsstellung bleibtNormally, the backlash between teeth 27 and 28 is sufficient to allow the brake actuation movement recorded so that the driver ring 24 remains in its operating position
Bei Abnutzung der Bremsbeläge wird das Flankenspiel bei der Bremsbewegung überbrückt und der Mitnehmerring 24 bewegt sich entsprechend. Beim Lösen der Bremse befindet sich der Mitnehmerring 24 in seiner Betriebsstellung, in welcher er am konischen Abschnitt 25 der Bohrung 3 anliegt und gegen Drehung gesichert ist Die weitere Röckkehrbewegung gleich: den Totgang aus, so daß die Zähne 27 und 28 erneut ineinandergreifen. Die abschließende Rückkehrbewegung übt durch die Zähne 27 und 28 eine Längskraft auf den angetriebenen Ring 29 aus. Da der Mitriehmerring 24 durch die Belastung der weicheren Feder gegen Drehung festgehalten ist und die Kupplungsflächen 33 und 34 aneinander anliegen, dreht der angetriebene Ring 29 das Schraubteil 10 mit sich mit um die wirksame Länge der Baugruppe 5 zu vergrößern, da der Kolben 8 durch die Bremsbacke über den Schlitz 6 gegen Drehung festgehalten istWhen the brake linings wear out, the backlash is bridged during the braking movement and so is the driver ring 24 moves accordingly. When the brake is released, the driver ring 24 is in his Operating position in which it rests on the conical section 25 of the bore 3 and is secured against rotation The further return movement is the same: the backlash off, so that the teeth 27 and 28 mesh again. The final return movement exerts a longitudinal force on the teeth 27 and 28 driven ring 29 from. Since the driver ring 24 against rotation by the load of the softer spring is held in place and the coupling surfaces 33 and 34 are in contact with one another, the driven ring 29 rotates the screw part 10 with it to increase the effective length of the assembly 5, since the piston 8 through the brake shoe is held against rotation via the slot 6
Die Stärke der Oberlastungsfeder 32 ist so gewählt, daß sich die Kupplungsflächen 33 und 34 dann voneinander lösen, wenn die Baugruppe 5 von einer besonders großen, rücktreibenden Kraft beaufschlagt wird, da in diesem Falle das durch die Gewindereibung zwischen dem Schraubteil 10 und demHohlkolben 8 bewirkte Reibmoment größer ist als das Reibmoment zwischen den Kupplungsflächen 33 und 34.The strength of the overload spring 32 is chosen so that the coupling surfaces 33 and 34 are then from each other solve when the assembly 5 is acted upon by a particularly large, restoring force, since in in this case caused by the thread friction between the screw part 10 and the hollow piston 8 Frictional torque is greater than the frictional torque between the coupling surfaces 33 and 34.
An den ringförmigen Anschlag 26 legt sich der Mitnehmerring 24 nur dann an, wenn sich die Baugruppe 5 in Bremsbetätigungsrichtung über einen normalen Bremsbetätigungsweg hinaus verstellt, was beispielsweise eintreten kann, wenn die Betätigungsvorrichtung bei nicht in Stellung beiindlicher Bremstrommel betätigt wird. Das Anlegen des Mitnehmerringes 24 an den Anschlag 26 verhindert dann eine weitere Bewegung der Baugruppe 5 nach außen, welche ansonsten durch übermäßige Verstellung des Spreizkeiles 12 dessen Beschädigung sowie eine Beschädigung der Rollen 18 hervorrufen könnte.The driver ring 24 only rests against the annular stop 26 when the assembly 5 Adjusted in the brake actuation direction beyond a normal brake actuation path, which for example can occur if the actuating device is actuated when the brake drum is not in position will. The application of the driver ring 24 to the stop 26 then prevents further movement of the assembly 5 to the outside, which would otherwise be damaged by excessive adjustment of the expanding wedge 12 as well as damage to the rollers 18 could result.
An dem dem Druckklotz 20 benachbarten Ende des Kopfes 11 ist ein Zahnrad 35 zur Montage des Schraubteiles 10 drehfest angeordnet Nach einem Bremsbakkenwechsel kann durch Zurückschrauben des Schraubteiles 10 unter Verwendung eines am Zahnrad 35 angesetzten Werkzeuges die Länge der Baugruppe 5 verkleinert werden.At the end of the head 11 adjacent to the pressure block 20 is a gear 35 for mounting the screw part 10 non-rotatably arranged After changing the brake jaws, the screw part can be screwed back 10 reduced the length of the assembly 5 using a tool attached to the gear 35 will.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB40452/75A GB1509398A (en) | 1975-10-03 | 1975-10-03 | Automatic slack adjusters for vehicle brakes |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2644212A1 DE2644212A1 (en) | 1977-04-14 |
DE2644212C2 true DE2644212C2 (en) | 1985-10-17 |
Family
ID=10414968
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2644212A Expired DE2644212C2 (en) | 1975-10-03 | 1976-09-30 | Automatic brake clearance adjustment device for vehicle brakes |
Country Status (10)
Country | Link |
---|---|
US (1) | US4085830A (en) |
JP (1) | JPS6022214B2 (en) |
BR (1) | BR7606603A (en) |
DE (1) | DE2644212C2 (en) |
ES (1) | ES452042A1 (en) |
FR (1) | FR2326625A1 (en) |
GB (1) | GB1509398A (en) |
HU (1) | HU174443B (en) |
IT (1) | IT1072585B (en) |
SU (1) | SU833171A3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014226273B4 (en) | 2014-12-17 | 2024-07-11 | Continental Automotive Technologies GmbH | Electromechanically actuated spreading device for a drum brake equipped with an adjusting device |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5577896A (en) * | 1978-12-07 | 1980-06-12 | Meiji Seika Kaisha Ltd | Preparation of high-purity maltose |
US4380277A (en) * | 1979-10-10 | 1983-04-19 | Lucas Industries Limited | Automatic slack adjusters for vehicle shoe-drum brakes |
US4301897A (en) * | 1979-12-13 | 1981-11-24 | Cox Jr Frank T | Slack adjuster |
US4351419A (en) * | 1980-05-07 | 1982-09-28 | Eaton Corporation | Automatic slack adjuster |
US4394890A (en) * | 1981-08-03 | 1983-07-26 | Eaton Corporation | Automatic slack adjuster |
US4535875A (en) * | 1982-03-09 | 1985-08-20 | Lucas Industries, Public Limited Company | Actuator for an internal shoe drum brake |
US4527683A (en) * | 1983-03-22 | 1985-07-09 | Eaton Corporation | Torque limiting coil clutch and automatic slack adjuster utilizing same |
FR2554194B1 (en) * | 1983-10-28 | 1986-01-17 | Dba | AUTOMATICALLY ADJUSTABLE BRAKE MOTOR |
FR2576650B1 (en) * | 1985-01-25 | 1987-03-20 | Bendix France | AUTOMATICALLY ADJUSTABLE BRAKE MOTOR |
US4632229A (en) * | 1985-10-23 | 1986-12-30 | Eaton Corporation | Automatic brake slack adjuster |
SE8605118L (en) * | 1985-11-29 | 1987-05-30 | Akebono Brake Ind | BRAKE CYLINDER WITH BUILT-IN SELF ADJUSTMENT |
GB8605393D0 (en) * | 1986-03-05 | 1986-04-09 | Lucas Ind Plc | Wedge & roller brake actuator |
DE4226143A1 (en) * | 1992-08-07 | 1994-02-10 | Teves Gmbh Alfred | Pressure-controlled, axially sliding adjusting device - has adjustment spindle with assisting piston activated by engaging friction coupling. |
US20070227837A1 (en) * | 2006-03-28 | 2007-10-04 | Akebono Corporation (North America) | Wedge roller ramp parking brake assembly |
ITMI20061513A1 (en) * | 2006-07-31 | 2008-02-01 | Poli Costruzione Materiali Trazione Spa | COMPACT BRAKING DISC UNIT FOR RAIL VEHICLES |
KR101327944B1 (en) * | 2012-01-25 | 2013-11-13 | 주식회사 만도 | Disc brake |
DE102013217065C5 (en) * | 2013-08-27 | 2022-11-17 | Saf-Holland Gmbh | brake unit |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3227247A (en) * | 1964-02-10 | 1966-01-04 | Rockwell Standard Co | Brake mechanisms |
DE1475498B2 (en) * | 1965-09-10 | 1972-10-05 | Alfred Teves Gmbh, 6000 Frankfurt | INDEPENDENT ADJUSTMENT DEVICE FOR SHEEP BRAKES |
US3610374A (en) * | 1969-08-08 | 1971-10-05 | Bendix Corp | Adjuster mechanism for wedge brakes |
GB1403357A (en) * | 1971-08-11 | 1975-08-28 | Girling Ltd | Brake adjusters |
GB1418629A (en) * | 1972-03-02 | 1975-12-24 | Automotive Prod Co Ltd | Adjusting devices for vehicles |
GB1418681A (en) * | 1972-03-03 | 1975-12-24 | Girling Ltd | Internal shoedrum brakes |
GB1419115A (en) * | 1972-03-23 | 1975-12-24 | Girling Ltd | Shoe drum brakes provided with automatic adjusters |
US3977500A (en) * | 1972-05-04 | 1976-08-31 | Girling Limited | Shoe drum brakes for vehicles |
GB1446552A (en) * | 1972-12-06 | 1976-08-18 | Girling Ltd | Brake assemblies |
GB1419254A (en) * | 1972-12-07 | 1975-12-24 | Girling Ltd | Textensible strut assemblies |
GB1456244A (en) * | 1973-01-27 | 1976-11-24 | Girling Ltd | Brake adjusters |
US3822003A (en) * | 1973-02-22 | 1974-07-02 | Rockwell International Corp | Automatic brake adjustment mechanism |
GB1463074A (en) * | 1973-03-20 | 1977-02-02 | Girling Ltd | Hydraulic brake actuator piston and slack adjuster assemblies |
-
1975
- 1975-10-03 GB GB40452/75A patent/GB1509398A/en not_active Expired
-
1976
- 1976-09-24 US US05/726,119 patent/US4085830A/en not_active Expired - Lifetime
- 1976-09-25 HU HU76GI252A patent/HU174443B/en unknown
- 1976-09-30 IT IT27822/76A patent/IT1072585B/en active
- 1976-09-30 DE DE2644212A patent/DE2644212C2/en not_active Expired
- 1976-10-01 JP JP51118441A patent/JPS6022214B2/en not_active Expired
- 1976-10-01 BR BR7606603A patent/BR7606603A/en unknown
- 1976-10-01 SU SU762406155A patent/SU833171A3/en active
- 1976-10-01 ES ES452042A patent/ES452042A1/en not_active Expired
- 1976-10-04 FR FR7629760A patent/FR2326625A1/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014226273B4 (en) | 2014-12-17 | 2024-07-11 | Continental Automotive Technologies GmbH | Electromechanically actuated spreading device for a drum brake equipped with an adjusting device |
Also Published As
Publication number | Publication date |
---|---|
FR2326625B1 (en) | 1982-10-01 |
GB1509398A (en) | 1978-05-04 |
FR2326625A1 (en) | 1977-04-29 |
SU833171A3 (en) | 1981-05-23 |
ES452042A1 (en) | 1977-10-01 |
HU174443B (en) | 1980-01-28 |
JPS5244378A (en) | 1977-04-07 |
DE2644212A1 (en) | 1977-04-14 |
JPS6022214B2 (en) | 1985-05-31 |
IT1072585B (en) | 1985-04-10 |
BR7606603A (en) | 1977-05-31 |
US4085830A (en) | 1978-04-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |